Abstract: A band adapted for use as a seal around an upper edge of a boot adapted for holding a block to which a rail is fastened, includes an elongated body having an outer face, an inner face, a first end and a second end. The first and second ends of the elongated body are secured to each other to form the band. An inner face of the elongated body is smooth and an outer face thereof includes a plurality of laterally spaced ribs. The ribs extend from the first end of the band to the second end thereof. The elongated body is made from an electrically insulating elastomeric material.

Abstract: A band adapted for use as a seal around an upper edge of a boot adapted for holding a block to which a rail is fastened, includes an elongated body having an outer face, an inner face, a first end and a second end. The first and second ends of the elongated body are secured to each other to form the band. An inner face of the elongated body is smooth and an outer face thereof includes a plurality of longitudinally spaced ribs. The ribs extend from the first end of the band to the second end thereof. The elongated body is made from an electrically insulating elastomeric material.